Lunch box



FIG. 1 is a first perspective view of a lunch box showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a perspective view of another state of the lunch box thereof;

FIG. 10 is an enlarged view of the selected portion in FIG. 9 ; and,

FIG. 11 is an enlarged view of the selected portion in FIG. 9 .

The broken lines shown in the drawings depict portions of the lunch box in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a lunch box, as shown and described. 